Smart locks work by using wireless communication technology, such as wi-fi or bluetooth, to connect to a mobile device or the internet. they use various methods to authenticate the user and allow entry into a home or building.

here's how a smart lock generally works:

1.authentication: the first step is for the user to authenticate themselves through their smartphone or key fob. this can be done via several methods including fingerprint scanning, facial recognition, touch id, or entering a code.

2.communication: after authentication, a secure wireless connection is established between the smart lock and the user's mobile device or the internet. 

3.remote access: once connected, the user can remotely lock or unlock the smart lock from anywhere they have an internet connection. some smart locks also provide the ability to grant temporary access to guests or service providers.

4.integration with other smart devices: smart locks can also integrate with other smart devices in the home, such as security cameras, thermostats, and lighting systems, to provide an integrated home automation experience.

overall, smart locks offer convenience and enhanced security features that traditional locks cannot provide, making them a popular option for homeowners and renters alike.